The 1.6-million-square-foot building, designed by architects Kohn Pedersen Fox Associates, is scheduled for completion in 2020. A development of SL Green, One Vanderbilt will occupy a full city block adjacent to Grand Central Terminal. The 58-story structure will feature column-free floors with floor-to-ceiling slab heights ranging from 14.6 feet to 20 feet, a 30,000-square-foot amenity floor and direct connections to the area’s mass transit network, which will receive $220 million in upgrades as part of the project. TD Bank has signed on as an anchor tenant and will occupy 200,000 square feet.